/*
 * Copyright 2020-2022 Equinix, Inc
 * Copyright 2014-2022 The Billing Project, LLC
 *
 * The Billing Project licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package org.killbill.billing.osgi.bundles.prometheus;

import java.io.IOException;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import io.prometheus.client.CollectorRegistry;

// We cannot use io.prometheus.client.exporter.MetricsServlet as the Exporter is private
public class KillBillMetricsServlet extends HttpServlet {

    private static final long serialVersionUID = -5387012973467577781L;

    private final transient KillBillExporter exporter;

    public KillBillMetricsServlet() {
        exporter = new KillBillExporter(CollectorRegistry.defaultRegistry, null);
    }

    @Override
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
        exporter.doGet(req, resp);
    }

    @Override
    protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
        exporter.doGet(req, resp);
    }
}
